Question

An educational psychologist has developed a new method to improve reading and writing. However, before designing...

An educational psychologist has developed a new method to improve reading and writing. However, before designing an experiment to test the new method, the psychologist needs to know if the assistants that will grade the essay are consistent. The psychologist has a random sample of students write an essay on the same topic. Every essay is then graded by every assistant on a 100 point scale. Below are the essay scores. What can the psychologist conclude with α = 0.05?

assistant 1 assistant 2 assistant 3 assistant 4
57
61
60
63
64
66
73
70
53
55
56
59
60
62
61
68
58
63
67
53
49
60
62
70
59
60
61
57
55
46
45
40

Compute the appropriate test statistic(s) to make a decision about H0.
p-value =   


c) Using the SPSS results, compute the corresponding effect size(s) and indicate magnitude(s).
η2 =

Homework Answers

Answer #1

Solution

An educational psychologist has developed a new method to improve reading and writing. However, before designing an experiment to test the new method, the psychologist needs to know if the assistants that will grade the essay are consistent.

applying one way ANOVA:

Source of variation SS df MS F p-value
Between Groups 532.8438 3 177.6146 4.3725 0.0120
With Groups 1137.3750 28 40.6205
Total 1670.2188 31

p value =0.0120 , reject Ho since p value <0.05

c) η2 =SS(BG)?SST =532.8438/1670.2188 =0.3190

effect size is large since η2 >0.25

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The authors used a more advanced statistical method than is covered by this course, however, you...
The authors used a more advanced statistical method than is covered by this course, however, you can apply what you know about hypotheses and statistical tests to understand their approach. Present hypotheses and conduct the appropriate statistical test to assess if the intervention and control groups differed in their Trail Making Test B results at follow-up (see Table 2). Comment on whether the conditions were met for using the selected test, include the StatCrunch output, and interpret your results in...
You are currently working at NCLEX Memorial Hospital in the Infectious Diseases Unit. Over the past...
You are currently working at NCLEX Memorial Hospital in the Infectious Diseases Unit. Over the past few days, you have noticed an increase in patients admitted with a particular infectious disease. You believe that the ages of these patients play a critical role in the method used to treat the patients. You decide to speak to your manager, and together you work to use statistical analysis to look more closely at the ages of these patients. The data set consists...
b. Assume a superior tells you she thinks it may be too much trouble to look...
b. Assume a superior tells you she thinks it may be too much trouble to look at 100 data points; so you apply the systematic random sampling method to find a sample of 10 observations from each of your two new tables, starting with the 5th observation (Vending 5 for Coke, Vending 55 for Pepsi) and taking every 5th observation after that. Compute the sample mean and sample standard deviation for Average Daily Sales for your new, smaller sample data...
A study of reading comprehension in children compared three methods of instruction. The three methods of...
A study of reading comprehension in children compared three methods of instruction. The three methods of instruction are called Basal, DRTA, and Strategies. Basal is the traditional method of teaching, while DRTA and Strategies are two innovative methods based on similar theoretical considerations. The READING data set includes three response variables that the new methods were designed to improve. Analyze these variables using ANOVA methods. Be sure to include multiple comparisons or contrasts as needed. Write a report summarizing your...
A study of reading comprehension in children compared three methods of instruction. The three methods of...
A study of reading comprehension in children compared three methods of instruction. The three methods of instruction are called Basal, DRTA, and Strategies. Basal is the traditional method of teaching, while DRTA and Strategies are two innovative methods based on similar theoretical considerations. The READING data set includes three response variables that the new methods were designed to improve. Analyze these variables using ANOVA methods. Be sure to include multiple comparisons or contrasts as needed. Write a report summarizing your...
TODO 1: Constructor. It assigns the songList member variable to a new instance of an ArrayList...
TODO 1: Constructor. It assigns the songList member variable to a new instance of an ArrayList that stores Song objects.. TODO 2: Implement the isEmpty method. Takes no parameters. Returns true if there are no songs on the list, false otherwise. TODO 3: Implement the addSong method. This method takes a Song object as a parameter and does not return a value. It adds the song to the songList. TODO 4: Implement the getSongListAsString method. This method takes no parameters....
USING C++ The purpose of this assignment is the use of 2-dimensional arrays, reading and writing...
USING C++ The purpose of this assignment is the use of 2-dimensional arrays, reading and writing text files, writing functions, and program planning and development. You will read a data file and store all of the input data in a two dimensional array. You will perform calculations on the data and store the results in the 2 dimensional array. You will sort the array and print the results in a report. Instructions You will read in the same input file...
Which application testing method tests applications from within using software instrumentation? 1 point SAST: Static Application...
Which application testing method tests applications from within using software instrumentation? 1 point SAST: Static Application Security Testing. IAST Interactive Application Security Testing. PAST: Passive Application Security Testing. DAST: Dynamic Security Application Testing. 57. Question 57 Which one of the OWASP Top 10 Application Security Risks would be occur when there are no safeguards against a user being allowed to execute HTML or JavaScript in the user's browser that can hijack sessions. 1 point Insufficient logging and monitoring Security misconfiguration...
I am making a game like Rock Paper Scissors called fire water stick where the rules...
I am making a game like Rock Paper Scissors called fire water stick where the rules are Stick beats Water by floating on top of it Water beats Fire by putting it out Fire beats Stick by burning it The TODOS are as follows: TODO 1: Declare the instance variables of the class. Instance variables are private variables that keep the state of the game. The recommended instance variables are: 1. 2. 3. 4. 5. 6. A variable, “rand” that...
please write the code in java so it can run on jGRASP import java.util.Scanner; 2 import...
please write the code in java so it can run on jGRASP import java.util.Scanner; 2 import java.io.*; //This imports input and output (io) classes that we use 3 //to read and write to files. The * is the wildcard that will 4 //make all of the io classes available if I need them 5 //It saves me from having to import each io class separately. 6 /** 7 This program reads numbers from a file, calculates the 8 mean (average)...